Ananova:

Smokers trying to quit in Glasgow have been mistakenly prescribed Viagra.

NHS Greater Glasgow and Clyde said the error was due to a computer error, reports the BBC.

When GPs selected anti-smoking pill Zyban, computers selected sildenafil - the name for Viagra.

An NHS spokeswoman said: "At no time was patient care affected by this as all prescriptions are subject to stringent double checking."